GUILCOR AR004740, Инструкция по эксплуатации, Страница: 2 / 7

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Instruction manual for use of
AR004740
transmitter
Transmitter is designed for measurement of ambient air temperature at °C or °F. Measuring
temperature sensor is non-removable instrument part. Measured temperature is displayed on LCD
display. It is possible to switch OFF the LCD display. Transmitter is connected to circuitry by
current loop.
All transmitter setting is performed by means of the PC connected via the optional
AR006576
communication cable (not included in delivery). Program Tsensor for transmitter setting
is available to download free at www.
guilcor.com
. Program enables to set measured range
and on/off the LCD display. It supports make the adjustment of the device too. This procedure
is described at file „Calibration manual.pdf“ which is installed commonly with the software.
Please read instruction manual before the first device connection.
Device setting from the manufacturer
Transmitter is set from the manufacturer to the following parameters:
value at output I1: temperature, range 4 – 20 mA corresponds to -30 to +80 °C
display: switched ON
Modification of the setting is possible to do by means of the PC using procedure described
at the end of this document.
Installation of the transmitter
Transmitter is designed for wall mounting. There are two mounting holes at the sides of the
case. Don’t connect transmitter while power supply voltage is on. Interconnection terminals
of
AR004740
are accessible after unscrewing four screws and removing the lid. Lace the cable
through a gland at the case wall. Connect the cable to terminals with respecting the signal polarity
(see figure). Terminals are self-clamping and can be opened by a suitable screwdriver. For the
opening, insert the screwdriver to upper terminal hole and lever by him. Do not remember to tighten
glands and case lid with inserted packing after cables connecting. It is necessary for warranting
of protection IP65.
It is recommended to use shielded twisted copper cable, maximal length 1200m. The
cable must be located at indoor rooms. The cable should not be led in parallel along power cabling.
Safety distance is up to 0.5 m, otherwise undesirable induction of interference signals can appear.
Outside diameter of the cable for
AR004740
device must be from 3,5 to 8 mm
.
In the application where air flow is too low it is possible that measurement accuracy may be a
bit lower (in decimals of °C) due to undesirable warm influence which develops in
transmitter electronics because of its own power dissipation. Mechanical construction of the
transmitter and working position is minimizing this effect, but in critical applications we
recommend to use optimal value of load resistor Rz (see “Typical application wiring”). It
minimizes power dissipation to minimal value. If Uss and Rz are set, it is possible to do it by
inserting of suitable serial resistor into current loop at estimation device side.
Electrical system (wiring) may do only worker with required qualification by rules in operation.